Door check



June 23, 1964 K. P. SOGOIAN 3,137,889

DOOR CHECK Filed Sept. 27, 1960 2 Sheets-Sheet 1 1N VEN TOR. kn: 00:7 1?coca/AM llll! HUM \M ATTOR/VEVS June 23, 1964 K. P. SOGOIAN 3,137,889

DOOR CHECK Filed Sept. 27, 1960 2 Sheets-Sheet 2 43 E E INVENTOR.

I K44 ausr P. soao/A/v ATTOR/VE Y5 United States Patent 3,137,889 DOORCHECK Kaloust P. Sogoian, 23633 Berg Road, Southfield, Mich. Filed Sept.27, 1960, Ser. No. 58,695 6 Claims. (Cl. 16-73) This invention relatesto door checks which are used to restrain and limit the opening of adoor.

In doors, particularly screen doors and storm doors, it is conventionalto utilize a door check which comprises a chain fastened at one end tothe door and at the other end to the door jamb. When the door is opened,the chain limits the maximum position to which the door may be opened,for example, by a sudden gust of wind. Such chain has a distinctdisadvantage in that it hangs downwardly and may strike either theperson or the door. A further disadvantage of the chain is that it formsa solid stop very suddenly thus causing possible damage to the door orthe door jamb. Therefore, a tension spring is sometimes used between oneend of the chain and the point of fastening. Although this provides ayielding force, it still hangs downwardly and has the same disadvantagesas the chain. In addition, tension springs have been provided to holdportions of the chain to prevent them from hanging downwardly.

It is an object of this invention to provide a door check which does nothang downwardly, which provides first a yielding force opposing movementof the door to maximum opening position and then a positive stop; andwhich can be manufactured at low cost and installed with a minimum ofdifiiculty.

Basically, the door check comprises a metal strap of spring materialincluding an intermediate yielding portion and end portions which arefastened respectively to the door and the door jamb. When the door isclosed, the portions of the strap are folded into adjacent relationshipand when the door is opened, the ends are first unfolded providing ayielding opposition to the opening movement of the door and then thestrap is extended to the full length providing a positive stop tofurther opening movement of the door.

In the drawings:

FIG. 1 is a fragmentary plan view of a door check embodying theinvention.

FIG. 2 is a plan view of the door check shown in FIG. 1 in position on adoor and door jamb.

FIG. 3 is a fragmentary perspective view of the door check shown inFIGS. 1 and 2 showing the relative relationship of the various portionsthereof when the door is partially open.

FIG. 4 is a fragmentary side elevation of the door check shown in FIG.2.

FIG. 5 is a plan view of a modified form of door check in position on adoor and door jamb.

FIG. 6 is a fragmentary elevation on a reduced scale of the door jambshown in FIG. 5.

FIG. 7 is a fragmentary perspective view of the door jamb shown in FIGS.5 and 6 showing the door check in open position.

FIG. 8 is a side elevation of a further modified form of door check.

FIG. 9 is a plan view of the door check shown in FIG. 8.

Referring to FIG. 1, door check 10 comprises a V- shaped central portion11 and arms 12, 13 extending outwardly from the ends of the V-shapedportion 11. The door check 10 is made of a single piece of fiat springstock. The end of arm 12 is bent over and fastened to .the body of thearm by a rivet 14 forming a loop 19 the end of arm 13 and is held inposition by screws 17 to prevent tearing thereof. A vertical headed pin18 extends through the loop 19 formed on the end of the arm 12 and isfixed on a bracket 20 that is adapted to be fastened to the horizontalsurface of a door jamb J by screws 21 extending through openings in thebracket 20. In mounting the door check 10, the apex of the V-shapedintermediate portion 10 is positioned so that it extends toward thehinge of the door D to the jamb I and the arms 12, 13 extend away fromthe hinge. The door check 10 is mounted so that it extends generallyhorizontally as shown in FIGS. 3 and 4.

When the door is closed, the ends of the legs of the V-shaped portion 11are in contact and the legs and arms 12, 13 are tensioned so that theybow outwardly as shown in FIG. 2. As the door is opened, the legs 12, 13are moved away from one another as shown in FIG. 3. As the door isfurther opened, the legs of the V-shaped portion 11 are moved away fromone another yieldingly resisting the opening action of the door D.Finally, when the door is fully opened, the door check 10 is fullyextended into a generally straight strap providing a positive stop tothe opening of the door.

Since the door check 10 is made of a single piece of flat stock andextends generally horizontally, no portion of the door check hangsdownwardly or in any way obstructs the head room.

A modified form of door check is shown in FIGS. 5, 6 and 7. Door check25 comprises a central arcuate portion 26 and straight arms 27, 28extending away from the ends of the arcuate portion 26. Door check 25 ismade from a single piece of flat spring stock. The end of the arm 27 isprovided with openings 28 through which screws 29 extend to fasten thearm 27 to a door D. A plate 30 is interposed between the screws 29 andthe arm 27 to prevent tearing of arm 27. The end of arm 28 is providedwith an opening through which a horizontal headed pin 31 extends. Pin 31is fastened to a bracket 32 which, in turn, is fastened to a horizontalsurface of the door jamb I. In order to provide an increased yieldingresistance to the opening action of the door, a tightly wound tensionspring 33 is fastened to portions 34 bent outwardly from the ends ofarcuate portion 26. In position, arcuate portion 26 is nearest the hingeof the door with arms 27, 28 extending horizontally away from the hinge.

As the door is opened, the arms 27, 28 are moved outwardly away from oneanother and tension is applied to spring 33 resisting the opening actionof the door. As the door is opened to full open position, the tension onthe spring 33 is at maximum and the arms 27, 28 are bent relative to thearcuate portion to a maximum position providing a positive stop to theopening movement of the door D.

A further modified form of the invention is shown in FIGS. 8 and 9 andcomprises a door check 35 that is made of three sections of flat springstock including an arcuate central portion 36 and arms 37, 38 fastenedto the ends of the arcuate portion by rivets 39, 40.

The free end of arm 37 is fastened to the door jamb D in the same manneras the ends of the arms 12 and 27 of the previous forms of theinvention, namely, by utilizing a tear plate 41 and screws 42 extendingthrough openings in the tear plate and the end of the arm 37. The end ofthe arm 38 extends through a slot in a vertical shaft 43 and is pivotedabout a horizontal axis by a cross pin 44. The shaft 43 is rotatablymounted on a bracket 45 that is fixed to the door jamb D by screws 46extending upwardly and threaded into the door jamb.

The form of the invention shown in FIGS. 8 and 9 can be made such thatthe thickness and, in turn, the

3 resistance to deformation of the portion 36 is greater than that ofthe arms 37, 38, whereby the action of the door check is substantiallythe same as the door check shown in FIGS. 5, 6 and 7.

It can thus be seen that I have provided a door check which does nothang downwardly when the door is closed; which yieldingly opposes thedoor and thereafter provides a definite stop to the opening action ofthe door; and which can be manufactured at low cost and installed with aminimum of difiiculty.

I claim:

1. A door check comprising an intermediate V-shaped yieldinglyexpansible portion and a pair of arms extending outwardly away from saidV-shaped expansible portion, one end of one arm being fixed to one endof said expansible portion and one end of the other arm being fixed tothe other end of said expansible portion, the other end of said one armbeing adapted to be fastened to a door, the other end of said other armbeing adapted to be pivoted directly to a door jamb, said arms lying insubstantially the same plane as said expansible portion.

2. The combination set forth in claim 1 wherein said arms diverge awayfrom one another.

3. The combination set forth in claim 1 including a plate adapted tooverlie the other end of said one arm which is adapted to be fastened toa door.

4. A door check comprising a central expansible portion of predeterminedcurvature and a pair of arms extending outwardly away from said centralportion, one end of one arm being fixed to one end of said expansibleportion and one end of the other arm being fixed to the other end ofsaid expansible portion, the other end of said one arm being adapted tobe fastened to a door, the other end of said other arm being adapted tobe pivoted directly to a door jamb, said arms lying in substantially thesame plane as said expansible portion.

5. The combination set forth in claim 4 including a tension springextending between portions of said central expansible portion.

6. The combination set forth in claim 5 wherein said door check is madefrom a single piece of fiat stock.

References Cited in the file of this patent UNITED STATES PATENTS249,253 OLally Nov. 8, 1881 1,263,931 Rixson Apr. 23, 1918 1,319,554Anderson Oct. 21, 1919 1,916,882 Greene July 4, 1933 2,149,074 RunkleFeb. 28, 1939 2,565,442 Tharp Aug. 21, 1951 FOREIGN PATENTS 1,036,200France Apr. 22, 1953 355,394 Great Britain Aug. 27, 1931

1. A DOOR CHECK COMPRISING AN INTERMEDIATE V-SHAPED YIELDING EXPANSIBLEPORTION AND A PAIR OF ARMS EXTENDING OUTWARDLY AWAY FROM SAID V-SHAPEDEXPANSIBLE PORTION, ONE END OF ONE ARM BEING FIXED TO ONE END OF SAIDEXPANSIBLE PORTION AND ONE END OF THE OTHER ARM BEING FIXED TO THE OTHEREND OF SAID EXPANSIBLE PORTION, THE OTHER END OF SAID ONE ARM BEINGADAPTED TO BE FASTENED TO A DOOR, THE OTHER END OF SAID OTHER ARM BEINGADAPTED TO BE PIVOTED DIRECTLY TO A DOOR JAMB, SAID ARMS LYING INSUBSTANTIALLY THE SAME PLANE AS SAID EXPANSIBLE PORTION.